Need box desing HELP!!

Hey guys !! i am new to this forum but i have seen some boxes that are well buillt and well desing and i was wondering if you guys can help me to desing a ported box for 2 kicker cvr 15 "car make : mitsubishi mirage 4 dr and i have 16 H x 34 W x 24 D they have to be in 2 seperate boxes for it to fit in the trunk they will be powered by a orion 800 2 ch (800 rms x 1 @ 4ohm) dont know what frecuency to tune it to , i am new to this i just wanna get the most out of the amp and subs and get LOUD!!! or should i go whit a seald box!!what would you recommend it for a daily setup but i wanna hit a respectable number